17.00 - Environment Variables - Parallel Data Pump

Teradata® Parallel Data Pump Reference

Parallel Data Pump
June 2020
Programming Reference
Most environmental variables are difficult to control or modify. They include such things as:
  • Whether TPump is running on a TPA-node, non-TPA node, or an external client
  • The power of the client platform
  • The size of the pipe (network or channel) between the client and the database
  • The number of nodes and CPU power of the the database system
  • The TPump client software version
  • The Vantage software version.

Environmental variables become particularly important to consider when you are testing in one environment, and planning on moving a TPump into production in an entirely different environment. Performance expectations based on a set of TPump parameters that were optimized on a 1-node database test system, are unlikely to be entirely effective when moved to a 20-node production system with a more powerful client and wider network bandwidth. Some parameters settings will have to be rethought moving from test to production.